TY - GEN
T1 - Average-rate optimal PSAM transmissions over time-selective fading channels
AU - Ohno, Shuichi
AU - Giannakis, Georgios B.
PY - 2002
Y1 - 2002
N2 - Enabling linear minimum-mean square error (LMMSE) based estimation of random time-selective channels, pilot symbol assisted modulation (PSAM) has well documented merits as a fading countermeasure capable of improving bit error rate performance. In this paper, we establish average-rate optimality of PSAM by showing that the insertion of equi-powered and equi-spaced pilot symbols in PSAM transmissions maximizes a tight lower bound of the average channel capacity. Relying on a simple closed form expression of this bound in terms of the LMMSE channel estimator variance, we further design PSAM transmissions with optimal spacing of pilot symbols, and optimal allocation of the transmit-power budget between pilot and information symbols.
AB - Enabling linear minimum-mean square error (LMMSE) based estimation of random time-selective channels, pilot symbol assisted modulation (PSAM) has well documented merits as a fading countermeasure capable of improving bit error rate performance. In this paper, we establish average-rate optimality of PSAM by showing that the insertion of equi-powered and equi-spaced pilot symbols in PSAM transmissions maximizes a tight lower bound of the average channel capacity. Relying on a simple closed form expression of this bound in terms of the LMMSE channel estimator variance, we further design PSAM transmissions with optimal spacing of pilot symbols, and optimal allocation of the transmit-power budget between pilot and information symbols.
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U2 - 10.1109/WCNC.2002.993524
DO - 10.1109/WCNC.2002.993524
M3 - Conference contribution
AN - SCOPUS:84907527721
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 374
EP - 378
BT - IEEE Wireless Communications and Networking Conference, WCNC
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2002 IEEE Wireless Communications and Networking Conference, WCNC 2002
Y2 - 17 March 2002 through 21 March 2002
ER -